... structural geology reservoir geomechanics fracture propagation upstream oil & gas china government transverse isotropic rock geologist hydraulic fracturing geological subdiscipline propagation asia government pdlsm-fem specimen crack propagation transverse isotropic material...

... ABSTRACT Considering the low computational efficiency and accuracy of peridynamics (PD), a concurrent multiscale method coupling PD and finite element method (FEM) is proposed for modeling crack propagation of brittle rock under compressive load. In the coupling method, the fracture behavior...

... gas liquified natural gas corrosion management equation of state mechanism upstream oil & gas investigation crack propagation quartz chemical reaction atom propagation interaction stress corrosion ARMA 21 1758 Investigation of Stress Corrosion Cracking in rocks, a reactive...

... the gravel or bypassing the gravel. At present, the researches on the cracks propagation modes in rock conglomerate are almost based on simplified models. The discussion on the impact of the real meso-structures of reservoir conglomerate has certain limitations. In this study, three-point bending experiments...

... of crack propagation. Several benchmark examples, including stress intensity factor calculation, steady-state heat conduction, transient heat conduction, and deformation induced by thermal stress, are provided to validate TOUGH-FEMM in dealing with thermo-mechanical problems with cracking. Additionally...

... ABSTRACT: For an efficient design in a hydraulic fracturing operation, reliable predictions of the applied pressure, and fracture initiation and propagation are important. In this paper, a hybrid bonded particle system and finite element domain is used to study the crack propagation around...

... method US government contour hole fracture plane formation hydraulic fracturing roughness crack propagation application perimeter holmberg method blast design method damage zone 1. INTRODUCTION Ground fall has been considered as a major safety issue in underground excavations in the mining...

... ABSTRACT: Fiber-assisted diverting fracturing is an important stimulation technology when the formation has poor ability to produce complex fracture network. However, few investigations are focused on the influence of pore pressure on crack propagation in the process of fiber-assisted...

... the tertiary creep stage and average crack intensity of a specimen showed that the natural, pre-existing cracks and level of constant stress state dominates the time to reach failure of rock. Further, SEM analysis of thin sections of the shale specimen showed the cracks propagation along the grain boundaries...

... geothermal reservoir Simulation temperature difference analytical model hydraulic fracturing aperture evolution numerical result hemisphere mechanics fracture overburden pressure asperity crack propagation propagation 1. INTRODCUTION Fracture as a major factor which greatly affect the fluid...

... intensity factor xfem method crack propagation crack aperture crack initiation fracture finite element method normal stress distribution 1. INTRODUCTION The presence of flaws such as joints, cracks and faults are critical factors in analyzing reservoir systems (e.g., geothermal, and shale gas...

... investigation crack propagation complex fracture 1. INTRODUCTION In the 1850s, people began to study how to create artificial fractures in the reservoir to improve the efficiency of oil and gas production. The methods of forming artificial fractures can be classified into three types: hydraulic fracturing...

... in the context of an interfacial damage model. This model predicts crack propagation at angles ±? ch = ±(45 - ?/2) relative to the direction of compressive load, where ? is the friction angle. By using appropriate models for fracture strength anisotropy, we demonstrate the interaction of rock weakest plane...

..., and many groups endeavored such task. We have previously presented (ARMA 17-1044) a finite elements model which rigorously accounted for the mechanics of crack propagation, with a fluid pressure field homogeneous across the fluid domain. In the present work, we extend the model to a coupled fluid-solid...

... compressive strength Riemann solution effective stress model mohr-coulomb effective stress model mc effective stress model fracture wellbore integrity stress model fracture strength loading crack propagation traction interface ARMA 17-0679 Mixed-mode dynamic crack propagation in rocks...

... and sends a shock wave in rock. Given the limitations of hydraulic fracturing technique, we study the effectiveness of a hybrid approach where initial perforations similar to those for hydraulic fracturing are used as seeds of crack propagation under dynamic loading. Finally for very high rates of loading...

... and other parameters. 1. INTRODUCTION reservoir geomechanics strength experiment displacement data Reservoir Characterization coal body similar material crack propagation Upstream Oil & Gas mechanism hydraulic fracturing optical fiber sensor coal Carbon Dioxide Phase Transition...

..., Jung argued that tensile fracturing and not shear slip or propagation is the main mechanism of stimulation, recommending a return to the conventional stimulation concept. In this paper, we review the concept of wing-crack propagation and show this mechanism is in fact, an integral part of the shear...

... Abstract: An improved understanding of rock bridge failure is a significant factor in future mining and geotechnical studies, particularly as open pits increase in depth. The progressive failure of rock bridges is an important process during damage development and brittle crack propagation...

... since it can perform arbitrary crack propagation without remeshing and elements containing a crack are not required to conform to crack edges. In this research XFEM is applied to investigate rock blasting based on the phantom node method where discontinuities in the displacement fields are introduced...